adapt phpunit tests to new SearchContext class

test/php/Nominatim/SearchContextTest.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace Nominatim;
+
+@define('CONST_BasePath', '../../');
+
+require_once '../../lib/SearchContext.php';
+
+class SearchContextTest extends \PHPUnit_Framework_TestCase
+{
+    private $oCtx;
+
+    protected function setUp()
+    {
+        $this->oCtx = new SearchContext();
+    }
+
+    public function testHasNearPoint()
+    {
+        $this->assertFalse($this->oCtx->hasNearPoint());
+        $this->oCtx->setNearPoint(0, 0);
+        $this->assertTrue($this->oCtx->hasNearPoint());
+    }
+
+    public function testNearRadius()
+    {
+        $this->oCtx->setNearPoint(1, 1);
+        $this->assertEquals(0.1, $this->oCtx->nearRadius());
+        $this->oCtx->setNearPoint(1, 1, 0.338);
+        $this->assertEquals(0.338, $this->oCtx->nearRadius());
+    }
+
+    public function testWithinSQL()
+    {
+        $this->oCtx->setNearPoint(0.1, 23, 1);
+
+        $this->assertEquals(
+            'ST_DWithin(foo, ST_SetSRID(ST_Point(23,0.1),4326), 1.000000)',
+            $this->oCtx->withinSQL('foo')
+        );
+    }
+
+    public function testDistanceSQL()
+    {
+        $this->oCtx->setNearPoint(0.1, 23, 1);
+
+        $this->assertEquals(
+            'ST_Distance(ST_SetSRID(ST_Point(23,0.1),4326), foo)',
+            $this->oCtx->distanceSQL('foo')
+        );
+    }
+}